Stress chemicals in body

[Sweet G]

I read somwhere that being stressed/uptight/worried etc actually produces harmful chemicals in the body as opposed to being relaxed/happy which produces helpful chemicals. Can anyone explain the biochemistry of this please?? P.S I know about the effects on the heart/blood vessels, I want to know about actual chemical production due to stress. Thx

[woofgang]

here's a starting point http://www.thestudentclub.net/wellbeingsuccess/life/stress1.htm

[woofgang]

and here's another opinion

http://www.coronarythrombosistrust.org.uk/html/stress.html